Post Frost Biomass — Main Cropping System Experiment (MCSE)

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Successional fields are model ecosystems representing conversion of agricultural fields back to the natural vegetation. Successional systems have a potential to be used for cellulosic biofuels feedstock production. Use of successional systems for cellulosic biomass production requires measurements of harvestable biomass availability from these fields. We initiated such measurements by comparing biomass productivity at peak green biomass and post frost biomass, as measure of maximum and minimum harvestable biomass availability. Post frost biomass samples are taken after the air temperature as dipped below -2.2 C or 28 F at least once.

The pre frost biomass was derived from the non crop biomass by combining all of the species except ‘surface litter’ into the “UnSorted” category and summing the station biomass by species and then averaging over the stations to obtain a pre frost biomass estimate.

This datatable is part of the Annual Net Primary Production on the Main Cropping System Experiment dataset. Aboveground annual net primary production (ANPP) has been measured on the LTER main site since 1990 and on the successional and forested sites since 1993. ANPP is measured at peak biomass for a given treatment. In some systems with multiple harvests or complex communities that have peaks occurring at different times of the year, measurements are taken at multiple times per year. Additional ANPP measurements are made where appropriate using leaf litter traps, estimates of diameter from tree basal diameter and for the poplar treatment occasional destructive harvests. See the ANPP protocol for descriptions of the sampling and measurement methods for each of the treatments.

Note

Experiment:	Main Cropping System Experiment (MCSE)
Data available from:	January 2008 to October 2021
Dataset:	KBS019
Datatable ID:	KBS019-023.107
Core Areas	Primary Production
Repository link:	http://doi.org/10.6073/pasta/f9b2a038b8a7ad43a252587a84935f30
Related Tables:	Standardized codes for identifying plant species Annual Crops and Alfalfa Biomass Non-crop (Weed) Biomass Cover Crop Biomass Scope of Non-crop Biomass Non-Crop (Weed) Species Diversity Index Annual Crops Population Estimates Temporal Harvest Top Non-crop species by Biomass Biomass Compilation for Herbaceous Systems Biomass data from Hess et al. 2020 Biomass and Species composition from the Prairie Strips Switchgrass stand count in T6 T7 plant species composition
Personnel:	Phil Robertson, lead investigator Stacey VanderWulp, principal contact
Last Updated	2022-06-14

Variate	Description	Units
Year	The year the sample was taken
campaign	The name of the sampling campaign
pre frost sample date	date of the pre frost sample
post frost sample date	sample date of the post frost sample
treatment	The Treatment sampled
replicate	The replicate sampled
station	the station within the plot that was sampled
species	The species observed
pre frost biomass	The peak harvestable biomass.	g/m²
post frost biomass	The harvestable biomass harvested after the frost	g/m²
comments	A comment on this data point

Protocols
Aboveground Net Primary Production - MCSE
Plant Identification

Download complete data table The standard data use policy applies to the this dataset

Data Excerpt

year	campaign	pre_frost_sample_date	post_frost_sample_date	treatment	replicate	station	species	pre_frost_biomass	post_frost_biomass
2021	Post Frost Biomass	2021-08-16	2021-11-09	T7	R1	S1	Surface Litter	7.85	2.76
2021	Post Frost Biomass	2021-08-16	2021-11-09	T7	R1	S1	UnSorted	517.47	369.19
2021	Post Frost Biomass	2021-08-16	2021-11-09	T7	R1	S2	Surface Litter	7.58	5.68
2021	Post Frost Biomass	2021-08-16	2021-11-09	T7	R1	S2	UnSorted	543.21	365.93
2021	Post Frost Biomass	2021-08-16	2021-11-09	T7	R1	S3	Surface Litter	17.0	5.38

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